考虑摩擦动力学特性的渐开线齿轮润滑分析  

Analysis of Lubricating Performance for Involute Gear Considering Tribo-Dynamic Behavior

作　　者：董辉立[1] 苑士华[1] 胡纪滨[1] 李雪原[1] 

机构地区：[1]北京理工大学车辆传动国家重点实验室,北京100081

出　　处：《摩擦学学报》2013年第5期436-442,共7页Tribology

基　　金：国家自然科学基金项目(51175038)资助~~

摘　　要：以渐开线齿轮为研究对象,综合考虑齿面摩擦、油膜刚度和阻尼的影响,将摩擦动力学特性和齿面形貌考虑到有限长线接触弹流润滑理论(EHL)中,采用多重网格数值求解法获得了渐开线齿轮在不同啮合位置处的动载荷分布,压力与膜厚分布,并对比分析了干摩擦与润滑条件下压力分布的不同特征以及动载荷对油膜分布的影响.计算结果表明:低速时,动载荷接近稳态分布,在单双齿交替点有明显的高频冲击,随着转速的增加,动载荷变化趋于平缓;与干摩擦相比,润滑油膜可以减小最大压力峰值以及入口区和出口区的压力,但对粗糙峰凹谷处压力有所增加.沿啮合线方向,压力在节点位置附近达到最大值,膜厚受动载荷的影响较小,近似呈线性增加趋势.The tribo-dynamic behavior was considered into finite line contact elastohydrodynamic lubrication （EHL） model for involute gear, which took the oil squeeze effects and friction into account. The multilevel method was applied to solve the complicated model. Comparisons were given between the results from dry rough surfaces and lubricated condition. The results show that the dynamic load was close to static force at low speed except some visible impacts at the transition points. As speed increased, dynamic load changed more smoothly. Compared with dry rough result, the lubricant film could lower the pressure peaks and the pressure built at inlet and outlet. Meantime, the hollow parts between two asperities had higher pressure with lubrication. Pressure reached its maximum value around the pitch point while the film thickness grew slowly under dynamic load.

关 键 词：渐开线齿轮 摩擦动力学 弹流润滑 有限长线接触 

分 类 号：TH117.2[机械工程—机械设计及理论]